diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2159441..2d730c0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@ This project adheres to [Semantic Versioning](https://semver.org/).
   * Implemented `iloc` in pandas Series and DataFrame index access
   * Added `verify=False` to GFZ requests
   * Updated documentation links and fixed intersphinx mapping
+  * Replaced `utcnow` with `now` and the UTC timezone
 * Bugs
   * Fixed errors introduced by assuming files will be present when combining
     F10.7 or Kp data in `combine_f107` and `combine_kp` functions.
diff --git a/pysatSpaceWeather/instruments/ace_epam.py b/pysatSpaceWeather/instruments/ace_epam.py
index ae439c6..a895fd1 100644
--- a/pysatSpaceWeather/instruments/ace_epam.py
+++ b/pysatSpaceWeather/instruments/ace_epam.py
@@ -68,7 +68,7 @@
 inst_ids = {inst_id: [tag for tag in tags.keys()] for inst_id in ['']}
 
 # Define today's date
-now = dt.datetime.utcnow()
+now = dt.datetime.now(tz=dt.timezone.utc)
 
 # ----------------------------------------------------------------------------
 # Instrument test attributes
diff --git a/pysatSpaceWeather/instruments/ace_mag.py b/pysatSpaceWeather/instruments/ace_mag.py
index 27e82fb..fbf874d 100644
--- a/pysatSpaceWeather/instruments/ace_mag.py
+++ b/pysatSpaceWeather/instruments/ace_mag.py
@@ -68,7 +68,7 @@
 inst_ids = {inst_id: [tag for tag in tags.keys()] for inst_id in ['']}
 
 # Define today's date
-now = dt.datetime.utcnow()
+now = dt.datetime.now(tz=dt.timezone.utc)
 
 # ----------------------------------------------------------------------------
 # Instrument test attributes
diff --git a/pysatSpaceWeather/instruments/ace_sis.py b/pysatSpaceWeather/instruments/ace_sis.py
index 5ad0596..405ab18 100644
--- a/pysatSpaceWeather/instruments/ace_sis.py
+++ b/pysatSpaceWeather/instruments/ace_sis.py
@@ -68,7 +68,7 @@
 inst_ids = {inst_id: [tag for tag in tags.keys()] for inst_id in ['']}
 
 # Define today's date
-now = dt.datetime.utcnow()
+now = dt.datetime.now(tz=dt.timezone.utc)
 
 # ----------------------------------------------------------------------------
 # Instrument test attributes
diff --git a/pysatSpaceWeather/instruments/ace_swepam.py b/pysatSpaceWeather/instruments/ace_swepam.py
index 174d424..e6a164c 100644
--- a/pysatSpaceWeather/instruments/ace_swepam.py
+++ b/pysatSpaceWeather/instruments/ace_swepam.py
@@ -67,7 +67,7 @@
 inst_ids = {inst_id: [tag for tag in tags.keys()] for inst_id in ['']}
 
 # Define today's date
-now = dt.datetime.utcnow()
+now = dt.datetime.now(tz=dt.timezone.utc)
 
 # ----------------------------------------------------------------------------
 # Instrument test attributes
diff --git a/pysatSpaceWeather/instruments/methods/ace.py b/pysatSpaceWeather/instruments/methods/ace.py
index 83f756f..5e11e2b 100644
--- a/pysatSpaceWeather/instruments/methods/ace.py
+++ b/pysatSpaceWeather/instruments/methods/ace.py
@@ -202,7 +202,7 @@ def download(date_array, name, tag='', inst_id='', data_path='', now=None,
     """
     # Ensure now is up-to-date, if desired
     if now is None:
-        now = dt.datetime.utcnow()
+        now = dt.datetime.now(tz=dt.timezone.utc)
 
     # Define the file information for each data type and check the
     # date range
diff --git a/pysatSpaceWeather/instruments/sw_ap.py b/pysatSpaceWeather/instruments/sw_ap.py
index cc20853..f87562f 100644
--- a/pysatSpaceWeather/instruments/sw_ap.py
+++ b/pysatSpaceWeather/instruments/sw_ap.py
@@ -89,7 +89,7 @@
 inst_ids = {'': list(tags.keys())}
 
 # Generate todays date to support loading forecast data
-now = dt.datetime.utcnow()
+now = dt.datetime.now(tz=dt.timezone.utc)
 today = dt.datetime(now.year, now.month, now.day)
 tomorrow = today + dt.timedelta(days=1)
 
diff --git a/pysatSpaceWeather/instruments/sw_f107.py b/pysatSpaceWeather/instruments/sw_f107.py
index 0bcf106..ee6da9b 100644
--- a/pysatSpaceWeather/instruments/sw_f107.py
+++ b/pysatSpaceWeather/instruments/sw_f107.py
@@ -95,7 +95,7 @@
 
 # Dict keyed by inst_id that lists supported tags and a good day of test data
 # generate todays date to support loading forecast data
-now = dt.datetime.utcnow()
+now = dt.datetime.now(tz=dt.timezone.utc)
 today = dt.datetime(now.year, now.month, now.day)
 tomorrow = today + dt.timedelta(days=1)
 
diff --git a/pysatSpaceWeather/instruments/sw_flare.py b/pysatSpaceWeather/instruments/sw_flare.py
index 54bd147..78870e0 100644
--- a/pysatSpaceWeather/instruments/sw_flare.py
+++ b/pysatSpaceWeather/instruments/sw_flare.py
@@ -74,7 +74,7 @@
 
 # Dict keyed by inst_id that lists supported tags and a good day of test data
 # generate todays date to support loading forecast data
-now = dt.datetime.utcnow()
+now = dt.datetime.now(tz=dt.timezone.utc)
 today = dt.datetime(now.year, now.month, now.day)
 tomorrow = today + dt.timedelta(days=1)
 
diff --git a/pysatSpaceWeather/instruments/sw_kp.py b/pysatSpaceWeather/instruments/sw_kp.py
index 030b93b..51a33cd 100644
--- a/pysatSpaceWeather/instruments/sw_kp.py
+++ b/pysatSpaceWeather/instruments/sw_kp.py
@@ -89,7 +89,7 @@
 inst_ids = {'': list(tags.keys())}
 
 # Generate todays date to support loading forecast data
-now = dt.datetime.utcnow()
+now = dt.datetime.now(tz=dt.timezone.utc)
 today = dt.datetime(now.year, now.month, now.day)
 
 # ----------------------------------------------------------------------------
diff --git a/pysatSpaceWeather/instruments/sw_mgii.py b/pysatSpaceWeather/instruments/sw_mgii.py
index c624a19..2dc766e 100644
--- a/pysatSpaceWeather/instruments/sw_mgii.py
+++ b/pysatSpaceWeather/instruments/sw_mgii.py
@@ -55,7 +55,7 @@
 
 # Dict keyed by inst_id that lists supported tags and a good day of test data
 # generate todays date to support loading forecast data
-now = dt.datetime.utcnow()
+now = dt.datetime.now(tz=dt.timezone.utc)
 today = dt.datetime(now.year, now.month, now.day)
 tomorrow = today + pds.DateOffset(days=1)
 
diff --git a/pysatSpaceWeather/instruments/sw_polarcap.py b/pysatSpaceWeather/instruments/sw_polarcap.py
index 9a85df0..7739ff1 100644
--- a/pysatSpaceWeather/instruments/sw_polarcap.py
+++ b/pysatSpaceWeather/instruments/sw_polarcap.py
@@ -69,7 +69,7 @@
 inst_ids = {'': list(tags.keys())}
 
 # Generate todays date to support loading forecast data
-now = dt.datetime.utcnow()
+now = dt.datetime.now(tz=dt.timezone.utc)
 today = dt.datetime(now.year, now.month, now.day)
 tomorrow = today + dt.timedelta(days=1)
 
diff --git a/pysatSpaceWeather/instruments/sw_sbfield.py b/pysatSpaceWeather/instruments/sw_sbfield.py
index f4207f4..352dcbf 100644
--- a/pysatSpaceWeather/instruments/sw_sbfield.py
+++ b/pysatSpaceWeather/instruments/sw_sbfield.py
@@ -52,7 +52,7 @@
 
 # Dict keyed by inst_id that lists supported tags and a good day of test data
 # generate todays date to support loading forecast data
-now = dt.datetime.utcnow()
+now = dt.datetime.now(tz=dt.timezone.utc)
 today = dt.datetime(now.year, now.month, now.day)
 tomorrow = today + pds.DateOffset(days=1)
 
diff --git a/pysatSpaceWeather/instruments/sw_ssn.py b/pysatSpaceWeather/instruments/sw_ssn.py
index 77eafba..81f6e9c 100644
--- a/pysatSpaceWeather/instruments/sw_ssn.py
+++ b/pysatSpaceWeather/instruments/sw_ssn.py
@@ -55,7 +55,7 @@
 
 # Dict keyed by inst_id that lists supported tags and a good day of test data
 # generate todays date to support loading forecast data
-now = dt.datetime.utcnow()
+now = dt.datetime.now(tz=dt.timezone.utc)
 today = dt.datetime(now.year, now.month, now.day)
 tomorrow = today + pds.DateOffset(days=1)
 
diff --git a/pysatSpaceWeather/instruments/sw_stormprob.py b/pysatSpaceWeather/instruments/sw_stormprob.py
index 1dea807..aec1fde 100644
--- a/pysatSpaceWeather/instruments/sw_stormprob.py
+++ b/pysatSpaceWeather/instruments/sw_stormprob.py
@@ -70,7 +70,7 @@
 inst_ids = {'': list(tags.keys())}
 
 # Generate todays date to support loading forecast data
-now = dt.datetime.utcnow()
+now = dt.datetime.now(tz=dt.timezone.utc)
 today = dt.datetime(now.year, now.month, now.day)
 tomorrow = today + dt.timedelta(days=1)
 
diff --git a/pysatSpaceWeather/tests/test_methods_gfz.py b/pysatSpaceWeather/tests/test_methods_gfz.py
index c395433..dfdb8fb 100644
--- a/pysatSpaceWeather/tests/test_methods_gfz.py
+++ b/pysatSpaceWeather/tests/test_methods_gfz.py
@@ -40,7 +40,8 @@ def test_kp_ap_cp_download_bad_inst(self):
         """Test the download doesn't work for an incorrect Instrument."""
         with pytest.raises(ValueError) as verr:
             gfz.kp_ap_cp_download('platform', 'name', 'tag', 'inst_id',
-                                  [dt.datetime.utcnow()], 'data/path')
+                                  [dt.datetime.now(tz=dt.timezone.utc)],
+                                  'data/path')
 
         assert str(verr).find('Unknown Instrument module') >= 0
         return